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Fibrous-rooted perennial 3–10 dm, finely glandular and often somewhat cobwebby-puberulent; lvs oblong to elliptic, lance-ovate, or ovate, 4–10 × 1–4 cm, sharply callous-denticulate, reticulate-veiny, rounded to acute at the tip, closely sessile and ± cordate-clasping; heads several or many in a short and broad, leafy infl; invol 5–8 mm, finely glandular or viscid-puberulent; disk 6–12 mm wide; cors ochroleucous; 2n=20. Permanently wet soil, often in meadows or swampy woods; s. N.J. to Fla. and Tex., chiefly near the coast, but sometimes inland, as in Mo.; W.I. Aug., Sept., or in the south all year.
